JPH05253379A - Preset switch of sewing machine for industrial use - Google Patents

Abstract

PURPOSE:To increase the practical effect by judging whether data of needle- count is altered from the previous one or not when the data input by a preset switch is transferred to a controller, and by preventing the transference of the data from the preset switch side when the data has not altered. CONSTITUTION:The comparative judgement flag is cleared to 0 as the initial value on starting in the electric source. When all of a needle-count-setting data switch, a pattern setting switch, and an initial-final-return sewing-setting switch are input, the flag is set '1'. And a comparative judgement flag is transferred by the transfer order from a controller. In the controller, this comparative judgement flag is referred and all data are not transferred when it is '0' and the machine starts sewing by use of latched previous data. In this time, the register is reset to complete this module. On the other hand, when it is '1', all data are transferred as the usual way and machine starts sewing in accordance with the data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an industrial sewing machine,
When the determination flag is set on the setting switch side and the controller unit refers to it and determines that there is no change from the previous data, the controller unit does not perform the transfer process, thereby shortening the sewing machine startup time.

[0002]

2. Description of the Related Art In the conventional data transfer method, since all data is transferred unconditionally regardless of whether the number of stitches is changed or not, it takes time from the start of sewing to the driving of the sewing machine.

[0003]

The problem to be solved by the present invention is not a method of comparing all the data of the previous time and the data of this time, but from the end of the previous sewing to the start of the next sewing. When any one of the number of stitches setting data switch, the pattern setting switch, and the reverse stitching at start / end stitching switch is input at least once, the comparison judgment flag is set on the setting switch side, and when the transfer command is sent from the controller section. This is a method of determining whether or not to transfer data by transferring the comparison determination flag and referring to it. Therefore, rather than using a large amount of memory and storing all the previous data and this data and comparing them, when the setting switch with the element that changes the data is input at least once, It is in the process of judging that it has changed. Therefore, even if the above-mentioned switch is input but the determination flag is "1" even when it matches the previous data, in that case, the conventional data transfer method is adopted.

[0004]

[Means for Solving the Problem] The method using the comparison / determination flag is not a method of using a large amount of memory to store all the previous data and the current data and comparing the data, but changing the data. If the above switch is input even once between the end of the previous sewing and the start of the next sewing, it is highly likely that it has been changed, so only at that time. As far as possible, all data is transferred as before. At that time, a comparison determination flag is provided and if any one of the stitch number setting data switch, the pattern setting switch and the reverse stitching setting switch at the beginning and end is input, the flag is set to "1" (initial value is 0). .. When a transfer instruction is received from the controller unit, the comparison determination flag is transferred from the setting switch side. The controller section refers to this comparison determination flag,
If it is "0", the transfer processing of all data is not performed, and sewing is started using the latched previous data. If it is "1", transfer processing of all data is performed and sewing is started according to the data. The comparison determination flag is 1
It is returned to "0" each time the transfer processing is completed. In this method, when the switch is input and the data matches the previous data, the determination flag becomes "1", but at that time, the conventional data transfer method is used. Therefore, with this method, the setting data will not be transferred until the sewing is started this time after the end of the previous sewing until the sewing is started this time. It is effective and does not deteriorate conventional functions.

[0005]

According to the present invention, if the stitch number setting data switch, the pattern setting switch, and the reverse stitching for start / end stitching setting switch are not input at all, the comparison judgment flag remains "0" and all data is not transferred. The point is to save time. When performing normal sewing, the number of stitches data is rarely changed every time, and the data set once is often continued, which is practical. Moreover, the addition of this function does not deteriorate the conventional function.

[0006]

Embodiments of the present invention will be described with reference to the drawings.

As the initial value, the comparison judgment flag is cleared to "0" at power-on, and the flag is set to "1" when the stitch number setting data switch, the pattern setting switch and the reverse stitching setting switch at the start and end are input (Fig. 2).

A comparison determination flag is transferred by a transfer command from the controller unit. The controller section refers to this comparison determination flag, and if it is "0", all data is not transferred, and sewing is started using the latched previous data. At that time, on the setting switch side, the register is restored and this module is terminated. If it is "1", transfer processing of all data is performed as usual, and sewing is started according to the data. The subsequent processing on the setting switcher side is the same as the conventional one, but finally the comparison determination flag is returned to "0" and the transfer is completed (see FIG. 4). Therefore, in the conventional transfer processing, the data was transferred unconditionally, which required a transfer time (see FIG. 3).

[0009]

[Effects of the Invention] Since the setting data is not transferred unless a switch having an element that changes the data from the end of the previous sewing to the start of this sewing is input, the data once set is continuously used. It is effective when you do.
Further, the rising time at the start of sewing is shortened for the continuous sewing with the same data. The present invention is modified only by software and does not require modification of hardware.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of an industrial sewing machine.

FIG. 2 is a flowchart for initializing and setting a comparison determination flag.

FIG. 3 is a diagram showing a conventional data transfer method.

FIG. 4 is a diagram showing a transfer method using a comparison determination flag.

FIG. 5 is a diagram showing a rising time from the sewing start command based on the same data until the sewing machine is driven.

Claims (1)

[Claims] 1. An industrial sewing machine comprising a sewing machine main body, a sewing machine driving motor operatively connected to a drive shaft of the sewing machine, a controller section for controlling and driving the motor, and a setting switch for setting a sewing pattern. At the time of transferring the stitch number data set by the setting switch to the controller section, a comparison judgment flag is provided to determine on the setting switch side whether the stitch number data was changed from the previous time and the comparison judgment flag is transferred to the controller section. After that, when the controller unit refers to the information and determines that it has not been changed, the setting switch of the industrial sewing machine is characterized in that the data transfer process from the setting switch side is not performed.